DotNet Interop: error constructor of XmlHttpClass

greys

Hi,

I'm currently in the process of migrating to NAV2013. I have a codeunit that contains all wisdom concerning calling webservices. It was formerly based on automations and I'm now bringing it up to date with the use of dotnet interoperability.

I have declared the following variables:

XmlHttp (DotNet,MSXML.IXMLHttpRequest.'Microsoft.MSXML, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a')
XmlHttpClass (DotNet,MSXML.XMLHTTPRequestClass.'Microsoft.MSXML, Version=8.0.0.0, Culture=neutral,PublicKeyToken=b03f5f7f11d50a3a')

But on calling the following constructor

XmlHttp := XmlHttpClass.XMLHTTPRequestClass;

I get the error message

'Cannot create an instance of the following .NET framework object: assembly Microsoft.MSXML, Version=8.0.0.0, Culture-neutral,PublicKeyToken=b03f5f7f11d50a3a, type MSXML.XMLHTTPRequestClass'

Since .Net is not my natural development habitat, I'm a bit confused on what goes wrong. Anybody a suggestion?

Best regards,

Greys

greys

Mmmm, I think the configuration of our application server (Windows 2012) is the problem. Running the code from my local machine works flawlessly. Doesn't come Windows 2012 Server with the MSXML?

Regards,

Greys

Phdevries

We have exactly the same problem. Installing msxml 6 on the windows 2012 server won't help. Who has any suggestions?

oki

Hi,

you should assign the constructor result to the variable XmlHttpClass, not to XmlHttp:

XmlHttpClass := XmlHttpClass.XMLHTTPRequestClass;

Oli

oki

Hi,

I was wrong in my last post.

Here is the solution:

You have assigned an invalid .Net declaration in your variable definition:

use

MSXML.XMLHTTPRequest.'Microsoft.MSXML, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'

instead of interface

MSXML.

IXMLHttpRequest.'Microsoft.MSXML, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'

oli

Phdevries

In the end the problem was the lack of the assembly in C:\Windows\Assembly folder. Thanks everybody for their help.